A clean and minimalistic eCommerce theme
Price: $49
This premium theme has a fluid grid layout with a mobile ready responsive design (meaning the theme works perfectly on any device from desktop computers to smartphones). Additional features include beautiful custom product pages, pop-out shopping cart tab, an integrated blog, customizable theme options panel and more.
Preview | Download

Product Page

Link: Gridport WP Theme

See more Ecommerce premium WordPress themes

A customized fitness WP theme with lots of options
FitX WP Theme comes with a 12 pre-made skins with even an option to create your own. You can customize the colors, layout, fonts, and more in a few clicks using the FitX Options page. You can easily collect hot leads with the email opt-in widget, sell your own products or an affiliate’s, create a paid member’s area, train your clients online, or collect emails in exchange for access.
Price: $79
Preview | Download
You can get a 50% discount on this theme – but you have to act fast. There’s only
17 spots left, and they are going to be gone soon.  Use this coupon code when you checkout: 998D7

A clean business or personal WP theme
Price: $45
Galaxy comes with a front page slider where you can include posts or pages, display images or video. A portfolio page template includes lightbox that will help you display your products in an attractive way. There are three widget ready locations to help you promote your services and products easily.
Preview | Download

See more Business WordPress Themes

A flexible and responsive theme framework
Price:
Standard Package: $79
Developer Package: $159
This theme framework has a clean and simple design and includes a vast array of features, layout options, and customization possibilities. Backbone features include a comprehensive back-end control panel, templates for your blog, magazine, business, portfolio and even a photoblog layout, 6 single post & page layout options, typography and custom styling options, and a responsive design making it mobile ready.
Preview | Download

Business Layout

Portfolio Layout

Magazine Layout

See more of the Best Responsive WordPress Themes

Link: Backbone WP Theme

A smart, professional and responsive theme designed to show off your work
The theme utilizes a column based layout and some funky animation effects to keep your visitors entertained. Options include: Custom Breadcrumbs Navigation, Unlimited Color Schemes, Animated Drop-down Menu, Theme Options Panel, and more.
Price: $35
Preview | Download

Link: Construct WP Theme

See more: Premium WordPress Themes 2012 or Best Premium Portfolio Themes